My view is that one has to recognise the very different roles of the AAIB when investigating Military and Civilian accidents. In the latter (e.g. Clutha Vaults was mentioned), they look at events, factors and cause, including regulatory and organisational failures. In the former (e.g. MoK), they are prohibited from exploring beyond the immediate physical evidence at the scene (and sometimes not even that), everything else being the responsibility of the engineering member of the Board. He is normally very junior, almost by definition has little experience, doesn’t know what to ask and is often directed as to findings. Worse, the people who task and direct him often actively conceal evidence. That is what feeds a rumour site such as this and why we should be tolerant of comment by competent people. After all, it has cracked a few accidents discussed here over the years.